const 声明的arry 还是可以修改其中的值

但是Object.freeze(obj); 冻结的对象，就不可修改了

这里冻结的对象包括array 哦

const s = [1,2]
Object.freeze(s)
s[0] = 3//并不报错，s 的值还是[1,2]

let obj = {
  name:"FreeCodeCamp",
  review:"Awesome"
};
Object.freeze(obj);
obj.review = "bad"; // will be ignored. Mutation not allowed
obj.newProp = "Test"; // will be ignored. Mutation not allowed
console.log(obj); 
// { name: "FreeCodeCamp", review:"Awesome"}